`.handle()` w/ new text yields previous results if AssertionError is raised

[Antsthebul]

When using the same HTML2Text instance, the failure is presisted through future valid strings. Items that it tries to prepend the old text to the new text

• Version by html2text --version 2020.1.16
• Test script
• Python version python --version 3.10.11

Failing

test = "Hellow<![]-->world"
test2="Goodbye"

h = HTML2Text()

try:
    print(h.handle(test))
except AssertionError:
    h.handle(test2)

ouput

[...]    raise AssertionError(
AssertionError: expected name token at "<![]-->worldGoodbye"

Working

test = "Hellow<![]-->world"
test2="Goodbye"

h = HTML2Text()
try:
    print(h.handle(test))
except AssertionError:
    print("pass")

output

pass